* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #10131a;
  color: #f2f5f7;
  font-family: Arial, sans-serif;
}

.game-shell {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 24px;
  background: #181d27;
  border: 2px solid #2a3140;
  border-radius: 12px;
}

.board-panel {
  position: relative;
}

canvas {
  display: block;
  background: #0a0d14;
  border: 2px solid #2a3140;
}

#next {
  margin: 8px 0 24px;
}

.info-panel {
  min-width: 160px;
}

.info-panel h1 {
  margin: 0 0 16px;
  font-size: 32px;
}

.score-label {
  margin: 0;
  color: #a9b4c2;
}

.score-value {
  margin: 8px 0 24px;
  font-size: 36px;
  font-weight: bold;
}

.controls p {
  margin: 8px 0;
  color: #d3d9e0;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  background: rgba(0, 0, 0, 0.78);
}

.overlay p {
  margin: 0;
  font-size: 28px;
  font-weight: bold;
}

.overlay button {
  padding: 10px 18px;
  border: none;
  border-radius: 6px;
  background: #ffcc33;
  color: #111;
  font-weight: bold;
  cursor: pointer;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .game-shell {
    flex-direction: column;
    align-items: center;
  }

  .info-panel {
    min-width: auto;
    text-align: center;
  }
}